Which of the following is true for f? f(x)= 3x + 1, if -9 < x < -2 -5, if-2 < x≤ 1 (x-6, if 1 A The domain is -9 < x < -2, -2 B The range is (-26, 1). The function is decreasing over the interval (-2, 1). D The rate of change over the interval (-9, 1] is 3.